This work plan describes the additional assessment activities that will be completed at the former Hazardous Waste Storage Area (HWSA), Building 560, Rickenbacker Air National Guard Base (ANGB) in support of preparing a risk-based closure recommendation for soil and groundwater contaminated with petroleum and chlorinated hydrocarbons. This work plan was jointly prepared by Parsons Engineering Science, Inc. (Parsons-ES) under contract with the Air Force Air Mobility Command (AMC) and the Air Force Center for Environmental Excellence (AFCEE) and by International Technology Corporation (IT) under a separate contract with AFCEE. Information developed as part of this effort will be used to supplement existing site characterization data, optimize the design of engineering components for site closure, and establish long-term closure objectives for the site.

Enclosed please find the analytical results for the site located at the Rickenbacker Air National Guard Base located in Columbus, Ohio. Included are copies of the chain of custody, instrument sample log, raw data including chromatograms, and the analytical report including the quality control reports.

This risk-based corrective action plan includes conservative estimates of risk, conclusions, and recommended corrective actions for the former hazardous waste storage area (HWSA) at Building 560, Rickenbacker Air National Guard Base (ANGB), Ohio. The former HWSA is located at the edge of the shop area in the northern section of the Base. The HWSA was a permitted Resource Conservation and Recovery Act (RCRA) storage facility that received wastes generated during Base activities from 1983 through 1986. Wastes stored at the HWSA consisted primarily of acids, various solvents and cleaning solutions, petroleum products, and spent desiccants. Waste was stored in small containers placed on pallets inside Building 560 and in larger, 55-gallon drums outside the building (within the fenced yard). Additionally, 15 underground storage tanks (USTs) were previously located at or near the HWSA. These USTs were used for the storage of fuel waste, waste petroleum products, and deicing fluid. The Air Force Base Conversion Agency (AFBCA) has been granted No Further Response Action Planned (NFRAP) status for the tanks. Residual contamination in soil and groundwater is addressed as part of the risk-based corrective action presented in this report.

This amended closure/post-closure plan describes the proposed closure approach for the former hazardous waste storage area (HWSA) at Building 560, Rickenbacker Air National Guard Base (ANGB), Ohio. The former HWSA is located at the edge of the shop area in the northern section of the base. The HWSA was a permitted storage facility that received wastes generated during base activities from 1983 to 1986. Wastes stored in the HWSA consisted primarily of acids and spent desiccants. Waste was stored in small containers placed on pallets inside Building 560 and in larger, 55-gallon drums outside the building (within the fenced yard). Additionally, 15 underground storage tanks (USTs) were previously located at Building 560/HWSA. These USTs were used for the storage of waste fuel, waste oils, and deicing fluid. The Air Force Base Conversion Agency (AFBCA) has been granted "No Further Response Action Plan" (NFRAP) status for the tanks. Residual contamination in soil and groundwater is addressed as part of the closure approach presented in this closure/post- closure plan. This amended closure/post-closure plan was prepared in compliance with the Ohio Administrative Code (OAC) Chapter 3745 Part 66 and the Code of Federal Regulations (CFR), Title 40 Part 265, Subpart G.

This amended closure plan describes the proposed closure approach for the former hazardous waste storage area (HWSA) at Building 560, Rickenbacker Air National Guard Base (ANGB), Ohio. The former HWSA is located at the edge of the shop area in the northern section of the Base. The HWSA was a permitted Resource Conservation and Recovery Act (RCRA) storage facility that received wastes generated during Base activities from 1983 through 1986. Wastes stored at the HWSA consisted primarily of acids, various solvents and cleaning solutions, petroleum products, and spent desiccants. Waste was stored in small containers placed on pallets inside Building 560 and in larger, 55-gallon drums outside the building (within the fenced yard). Additionally, 15 underground storage tanks (USTs) were previously located at or near the HWSA. These USTs were used for the storage of fuel waste, waste petroleum products, and deicing fluid. The Air Force Base Conversion Agency (AFBCA) has been granted No Further Response Action Planned (NFRAP) status for the tanks. Residual contamination in soil and groundwater is addressed as part of the closure approach presented in this closure plan. This amended closure plan was prepared in compliance with the Ohio Administrative Code (OAC) Chapter 3745 Part 66 and the Code of Federal Regulations (CFR), Title 40 Part 265, Subpart G.